161 results about "Fluoroboric acid" patented technology

The invention provides a non-aqueous electrolyte, a lithium ion battery, a battery module, a battery pack and a power utilization device, the non-aqueous electrolyte comprises a lithium salt, an organic solvent and an electrolyte additive, and the electrolyte additive comprises 1, 3-propane sultone, fluoroethylene carbonate, vinylene carbonate, lithium tetrafluoroborate and a compound I shown in the formula I. The non-aqueous electrolyte is applied to the lithium ion battery, and the cycle life of the lithium ion battery is prolonged.

The invention relates to viologen-anthraquinone composite electrochromic liquid and a preparation method thereof, the viologen-anthraquinone composite electrochromic liquid comprises 1.2-2.5 parts by mole of viologen salt, 0.8-1.5 parts by mole of anthraquinone derivative and 8-12 parts by mole of electrolyte; the viologen salt is ethyl viologen tetrafluoroborate or heptyl viologen tetrafluoroborate or octyl viologen tetrafluoroborate; the anthraquinone derivative is 1-ethylamino-4-hydroxy anthraquinone or acid blue 43; the preparation method comprises the following steps: preparing an electrolyte solution; adding purple refined salt and anthraquinone derivatives according to the formula; fully dissolving the electrochromic material to form uniform and transparent initial liquid; and degassing the initial liquid to remove oxygen dissolved in the initial liquid. The electrochromic liquid has the advantages that after the purple refined salt and the anthraquinone derivative are added into the dissolving solution according to the proportion of the formula, the two color-changing materials are jointly dissolved in the electrolyte, and when the two color-changing materials are reduced at the same time, spectrum superposition absorbed by the two color-changing materials can cover the whole visible region, so that black and white switching of the electrochromic liquid is realized, and the use effect is good.

This application relates to a copper-aluminum brazed terminal block and its manufacturing method, belonging to the field of power fittings technology. It consists of an aluminum-based terminal block with a copper sheet welded to it. The flux used in the welding is a high-performance, non-corrosive copper-aluminum flux composed of the following components: potassium fluoroaluminate, cesium ammonium fluoride, 1-butyl-3-methylimidazolium tetrafluoroborate, potassium fluorotitanate, and nano-copper oxide. The process involves chemically stripping the dense alumina film using highly active fluorine species released from a pure fluorinated ionic liquid, achieving film removal and avoiding the thermal effects of high temperatures. Secondly, a nano-titanium transition layer is generated in situ through a liquid-phase displacement reaction of potassium fluorotitanate on the nascent aluminum surface, achieving a qualitative change in joint strength from mechanical interlocking to intrinsic metallurgical bonding. Finally, the elimination of chlorine and the presence of a self-cleaning mechanism prevent the flux from absorbing moisture and hydrolyzing or causing electrochemical corrosion, thus ensuring long-term reliability and durability of the joint under harsh environments while achieving good connection performance.

This invention relates to a tetrafluoroborate imidazole-based metal ionic liquid, its preparation method, and its application in coating aluminum powder. The invention pertains to the preparation method of a tetrafluoroborate imidazole-based metal ionic liquid and its use in combination with aluminum powder to form a core-shell fuel (aluminum powder@metal ionic liquid). The aluminum powder@metal ionic liquid core-shell fuel uses aluminum as the core and a tetrafluoroborate imidazole-based metal ionic liquid as the shell material, prepared via solvent evaporation. This series of core-shell fuels exhibits excellent thermal properties and is primarily suitable for solid propellant fuel applications. Furthermore, the preparation method provided by this invention is simple, operates under mild conditions, and uses readily available raw materials.

An electrochemical method for preparing N-arylsulfonylimine compound, comprising the following steps: in air atmosphere, a sulfoximine compound and an alpha-keto acid are added into a reactor in a molar ratio of 1:2, an electrolyte tetrabutylammonium tetrafluoroborate, a catalyst nickel bromide are added, and then an acetone solution is added; the mixture is stirred by a magnetic stirring device, and is dissolved; two electrodes are inserted, a graphite electrode is used as a positive electrode, and a platinum sheet electrode is used as a negative electrode; 6mA of current is passed, and the current passing time is 3h; after the reaction is completed, the solvent is removed by vacuum evaporation to obtain a crude product, and the N-arylsulfonylimine compound is obtained by column chromatography purification. Compared with a traditional synthesis method, the method has the advantages that the reaction condition is mild, can be successfully carried out at room temperature, operation is simple, all operations can be carried out in an open system, an electric current is used as an oxidation method, pollution of a chemical oxidant is avoided, raw materials are easy to obtain, functional group compatibility is good, and the scope of application of a substrate is wide.

The application provides a preparation method and application of a near-infrared two-region fluorescent sensor, and chiral single-walled carbon nanotubes are separated by using a double water phase extraction method; materials in the separation process include deionized water, polyethylene glycol, dextran, sodium dodecyl sulfate, sodium deoxycholate and cholic acid sodium hydrate; the chiral single-walled carbon nanotubes are dispersed and mixed with 4-nitrobenzene tetrafluoroboric acid diazonium salt to obtain the fluorescent sensor; high-purity (6,5)-SWCNT is efficiently and simply separated by using the double water phase extraction technology, the prepared SWCNT-NBD nanomaterial has good optical performance, including bright light emission in the near-infrared two-region, has good penetration capacity on biological tissues, the fluorescent detector (SWCNT-NBD) has low detection line, wide linear range, good selectivity on DA, and is convenient to prepare and low in cost.

The invention discloses a super capacitor electrolyte and a super capacitor, and relates to the technical field of super capacitors, the super capacitor electrolyte comprises an electrolyte, a solvent and a functional additive; the electrolyte comprises spiro quaternary ammonium tetrafluoroborate and triethyl methyl ammonium tetrafluoroborate; the solvent comprises acetonitrile and sulfolane; the functional additive is a compound with a crown ether structure prepared through a thiol-ene click reaction; the addition amount of the functional additive is 1-10% of that of the solvent. The supercapacitor electrolyte system can resist high voltage and has wide temperature adaptability, that is, the supercapacitor electrolyte system has good high temperature resistance and low temperature resistance, so that the application requirement of a supercapacitor in a complex and severe environment is met.

The invention discloses a supported catalyst and application thereof in synthesis of difluoroacetyl fluoride, the supported catalyst comprises a carrier and active components, the active components comprise superacid and an active auxiliary agent; in the supported catalyst, the loading capacity of the superacid is 20 wt%-25 wt%, and the loading capacity of the active auxiliary agent is 5 wt%-10 wt%; the superacid is selected from at least one of fluoboric acid, fluorosulfonic acid, fluoroantimonic acid and carborane acid; the active auxiliary agent is selected from at least one of molybdenum nitrate, technetium nitrate, ruthenium nitrate, rhodium nitrate and chromic nitrate; when the supported catalyst is used for synthesizing difluoroacetyl fluoride, 1, 1, 2, 2-tetrafluoroethyl ethyl ether is used as a raw material, hydrogen fluoride is added under the action of the supported catalyst to inhibit generation of ethylene, and difluoroacetyl fluoride and fluoroethane are generated through cracking under relatively mild conditions; compared with an existing preparation method, the conditions are milder, and the one-way yield is larger than 95%.

The invention discloses a battery monomer, an isolating membrane, a preparation method of the isolating membrane, a battery device and a power utilization device, the battery monomer comprises the isolating membrane and electrolyte, and the isolating membrane comprises a porous base membrane; the coating is arranged on at least one side of the porous base membrane and comprises a polymer additive, and the polymer additive comprises a first functional group and a second functional group; the first functional group comprises one or more of bis (fluorosulfonyl) imino group, bis (trifluoromethyl) sulfonyl imino group, trifluoroboric acid group, hexafluorophosphoric acid group, sulfonic acid group, hexafluoroarsenate group, trifluoromethanesulfonic acid group, difluorophosphoric acid group, bis (oxalato) boric acid group, difluoro (oxalato) boric acid group, difluoro (oxalato) phosphoric acid group, tetrafluoro (oxalato) phosphoric acid group and imidazolyl; the second functional group comprises one or more of quaternary ammonium ions, pyrrolidinyl, pyrrolyl, piperidinyl, pyridyl and imidazolyl. The battery monomer has good dynamic performance; the invention provides the isolating membrane for realizing the beneficial effects of the battery monomer, the preparation method of the isolating membrane, the battery device and the power utilization device.

The invention provides a reflective integrated electrochromic device. The reflective integrated electrochromic device sequentially comprises a first substrate layer, a working electrode layer, an integrated electrochromic layer, a counter electrode layer and a second substrate layer, the integrated electrochromic layer comprises a metal source compound; the metal source compound is selected from silver chloride, silver acetate, silver nitrate, silver perchlorate, silver sulfate, silver cyanide, silver sulfide, silver hexafluorophosphate, silver tetrafluoroborate, silver tetrachloroaluminate, silver trifluoromethanesulfonate, silver bis (trifluoromethane sulfonimide), copper fluoride, copper chloride, copper cyanide, copper sulfate, copper acetate, copper aluminate, cuprous fluoride, cuprous chloride, cuprous cyanide, gold chloride and gold cyanide; the catalyst is one or more of gold sulfide, gold chloride, gold (II) sulfide, nickel chloride, nickel sulfate, cobalt chloride and platinum chloride. The device has a relatively large transmittance / reflectivity dynamic change range, can perform light and heat management at the same time, and can keep a stable coloring or fading state for one month or even several months under a no-load condition.

This invention relates to the field of electrochemical technology, specifically to fluoroalkylalkylbissulfonamide lithium, its preparation method, electrolyte, and lithium battery. A fluoroalkylalkylbissulfonamide lithium is provided, satisfying the general structural formula shown in Formula IV: [Formula omitted for brevity], where R1 is one or more of monofluoromethyl, difluoromethyl, or trifluoromethyl; n is an integer from 0 to 9; and R2 is selected from C1 to C10 alkyl groups. The fluoroalkylalkylbissulfonamide lithium can synergistically improve battery cycle life, service stability, and high-temperature performance with FEC. A method for preparing fluoroalkylalkylbissulfonamide lithium includes: mixing fluoroalkylsulfonyl chloride, alkylsulfonamide, and a weak base, and carrying out a first reaction to obtain fluoroalkylalkylbissulfonamide potassium; mixing fluoroalkylalkylbissulfonamide potassium and lithium tetrafluoroborate, and carrying out a second reaction to obtain [Foamide]. This significantly shortens the reaction route for preparing bissulfonamide lithium, and offers mild conditions, high yield, low production cost, and simple operation.

To provide a separation membrane with high separation performance for mixed gases containing acidic gases. [Solution] The separation membrane 10 of the present invention comprises a separation functional layer 1 containing graphene oxide, an ionic liquid, and a polymer. The ionic liquid is, for example, hydrophilic and contains imidazolium ions and tetrafluoroborate. The method for producing the separation membrane 10 of the present invention includes applying a coating solution containing graphene oxide, an ionic liquid, and a polymer to a substrate to obtain a coating film, and drying the coating film.

The invention discloses a nano composite ionic gel material with impact resistance and a preparation method thereof, and belongs to the field of polymer composite materials. The preparation method comprises the following steps: mixing and heating 5-methyl-2-isopropyl phenol and tetrabutylammonium tetrafluoroborate to prepare a solvent, adding isobornyl acrylate, hexafluorobutyl acrylate, KH570 modified silicon dioxide nanoparticles, 2, 6-diphenyl phenoxyethyl acrylate, a photoinitiator and a cross-linking agent into the solvent, and uniformly stirring to obtain the photocuring coating. And carrying out photopolymerization to obtain the nano composite ionic gel material. The nano-composite ionic gel material with impact resistance prepared by the invention is soft in a normal state and low in modulus; and when high-speed impact occurs, rapid and efficient energy dissipation occurs in the interior, the modulus is sharply increased, and the intelligent protection effect of'being rigid when encountering rigid and being flexible when encountering flexible 'can be achieved.

This invention discloses a method for large-size ammonium fluoroborate single crystal vapor phase growth, comprising the following steps: weighing two or more compounds containing NH4, B, O, and F as raw materials in a stoichiometric ratio of 1:4:6:1, mixing them thoroughly, adding a transport agent to obtain an initial mixture, and loading the initial mixture into a crystallization vessel; during the crystal growth stage, seed crystals or suspended seed crystals are selected by geometric selection and temperature screening among the grains; the crystallization vessel is dynamically heated within the temperature gradient zone of a vertical tube furnace, the dynamic heating being achieved by independently raising or lowering the temperatures of the high-temperature and low-temperature zones to dynamically control the temperature gradient of the crystal growth zone, so as to match it with the temperature gradient required at each stage of the crystal growth process; the raw materials crystallize in the crystal growth zone under the transport agent, resulting in large-size ammonium fluoroborate crystals. This invention produces large-size single crystals, is simple to operate, and highly practical, representing a superior ammonium fluoroborate single crystal growth process.

The application discloses an interface control liquid for prelithiation electrodes, a preparation method and application, and the interface control liquid comprises a solvent and a metal salt; the solvent comprises one or more of an ether solvent, an ester solvent, a ketone solvent, a hydrocarbon solvent, a nitrile solvent or deionized water; the metal salt comprises one or more of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium hexafluoroarsenate, lithium bisoxalate borate, lithium bisfluorosulfonimide, lithium bistrifluoromethylsulfonimide, lithium perchlorate, lithium fluoride and lithium chloride; the concentration of the metal salt is 0.001 g / mL-10 g / mL; the prelithiation electrode is obtained by supplementing lithium to an electrode by a chemical prelithiation solution; the interface control liquid is used for modifying the prelithiation electrode, the metal salt of the interface control liquid reacts with the chemical prelithiation solution remaining on the surface of the prelithiation electrode, and a solid electrolyte layer containing inorganic lithium salt is generated on the surface of the prelithiation electrode; wherein, the content of the inorganic lithium salt is between 5% and 90%.

The invention discloses a lithium ion electrolyte and a preparation method thereof as well as a lithium ion battery and a preparation method thereof. The lithium ion electrolyte comprises the following components: a lithium salt with the concentration of 1-1.5 mol / L, a fluoroborate-containing additive with the mass percent of 1-5%, a surfactant with the mass percent of 0.05-1% and the balance of a mixed solvent system, the mixed solvent system comprises tris (2, 2, 2-trifluoroethyl) phosphate, 1, 3-dioxolame and tetrahydrofuran; the preparation method of the lithium ion electrolyte comprises the following steps: preparing a mixed solvent system, adding a lithium salt and stirring; adding a fluoroborate-containing additive and a surfactant, stirring, and filtering; the lithium ion battery comprises a lithium ion electrolyte, a positive plate and a negative plate, the preparation method of the lithium ion battery comprises the following steps: assembling the positive plate, the diaphragm and the negative plate into a battery cell, and injecting the lithium ion electrolyte into the battery cell. The low-temperature discharge performance and the low-temperature cycle performance of the lithium ion battery are improved.

The invention relates to a novel lithium metal battery ether electrolyte and a preparation method thereof, the electrolyte comprises the following components: a non-aqueous organic solvent system, a lithium salt and an additive, the non-aqueous organic solvent system is preferably selected from ethylene glycol dimethyl ether and 1, 1, 2, 2-tetrafluoroethyl-2, 2, 3, 3-tetrafluoropropyl ether; the additive is preferably selected from lithium nitrate, lithium difluoro (oxalato) borate, tris (pentafluorophenyl) borane and pentafluorophenoxy cyclotriphosphazene; the lithium salt comprises at least one of lithium bis (fluorosulfonyl) imide, lithium bis (trifluoromethylsulfonyl) imide, lithium difluoro (oxalato) borate, lithium hexafluorophosphate and lithium tetrafluoroborate; the invention also provides a preparation method of the electrolyte and a battery formed by the electrolyte. The electrolyte provided by the invention realizes low impedance, high conductivity and long cycle life while maintaining high energy density, and provides an effective solution for safe and reliable operation of a metal lithium battery under harsh working conditions of high surface capacity, high current density and the like.

The application discloses a kind of polysubstituted phenol derivatives and electrochemical preparation method thereof, which uses 2-(benzo[d]thiazole-2-yl)-4-substituted phenol, substituted pyrazole or benzimidazole as raw material, tetrabutylammonium tetrafluoroborate as electrolyte, a mixture of hexafluoroisopropanol and dichloromethane (volume ratio 7:3) as solvent, direct electrolysis reaction under air atmosphere at room temperature to obtain the target product shown in formula one or formula two. Research has found that such products have good solid fluorescence and exhibit aggregation-induced emission properties in tetrahydrofuran and water systems. The method of the application has the advantages of simple operation, good compatibility of substrate functional groups, mild conditions, low production process cost and environmental friendliness.

The invention relates to a preparation method of a Co-based MOF material constructed based on H3BTTC. The preparation method comprises the following steps: adding a ligand and a metal salt into N, N-dimethylacetamide through a conventional solvothermal synthesis method, adding a tetrafluoroboric acid aqueous solution to adjust the pH value and polarity of the solution, heating and crystallizing in a drying oven, washing a product with a solvent for multiple times, and carrying out vacuum drying to obtain a target material. The method can accurately regulate and control pore channels, conditions are mild and efficient, the performance of the material in the fields of gas adsorption and separation, catalysis, sensing and the like is effectively improved, and the remarkable advantages are enhanced.

The invention relates to a preparation method and application of a suzertraline intermediate, 3, 4-difluoro-2-methoxyaniline is taken as a raw material, diazotization separation is carried out to obtain a stable solid intermediate compound 3, 4-difluoro-2-methoxybenzene diazonium tetrafluoroborate, and the suzertraline intermediate is prepared by a one-step method. Under the catalytic action of a titanium catalyst, coupling and configuration inversion are carried out to obtain a key intermediate (3S, 4S, 5R)-3-(3, 4-difluoro-2-methoxyphenyl) dihydro-4, 5-dimethyl-5-(trifluoromethyl)-2 (3H)-furanone, and the key intermediate is (3S, 4S, 5R)-3-(3, 4-difluoro-2-methoxyphenyl) dihydro-4, 5-dimethyl-5-(trifluoromethyl)-2 (3H)-furanone. The raw materials of the route are cheap and easy to obtain, the use of expensive palladium metal catalyst in the reaction route is reduced, the reaction site is single, byproducts are not easy to generate, and meanwhile, the quality control of the intermediate compound is facilitated.

This invention discloses a high-temperature resistant coupling block for high-temperature ultrasonic testing. The coupling block is formed by the polymerization and solidification of an ionic liquid via photoinitiation or thermal initiation, and can be manufactured using 3D printing technology. The ionic liquid contains heat-resistant cations and anions; the heat-resistant cations are specifically one or more of imidazoles, pyrroles, and triazoles; the heat-resistant anions are specifically one or more of bis(trifluoromethanesulfonyl)imide and tetrafluoroborate. The coupling block has an internal heat exchange channel structure. By adjusting the polymer matrix formulation and the geometry of the heat exchange structure, this invention can adjust the mechanical, heat-resistant, and acoustic properties of the coupling block, thereby adapting it to more scenarios. The coupling block is simple to prepare, inexpensive, and exhibits excellent acoustic performance, effectively filling the gap in existing ultrasonic testing methods that cannot effectively detect high-temperature scenarios (such as high-temperature pipes, high-temperature parts, and high-temperature tanks).

The invention discloses a hydrogel electrolyte as well as a preparation method and application thereof. The hydrogel electrolyte comprises a polymer network formed by crosslinking a vinyl monomer, a crosslinking agent and an initiator, and zinc tetrafluoroborate contained in the polymer network. In the hydrogel electrolyte, Zn (BF4) 2 catalyzes the initiator to generate free radicals to initiate vinyl monomer polymerization; the hydrogel electrolyte has excellent anti-freezing capability, and can still play a role normally even at low temperature. The invention also provides a preparation method of the hydrogel electrolyte, which does not need illumination, heat and toxic coagulant, and can quickly form gel within 1 minute; the preparation process is energy-saving and environment-friendly, the synthetic route is simple, and large-scale production can be

The application discloses a kind of stable crystal form photocatalyst and its preparation method, application, belong to photocatalyst technical field, the catalyst is 1-ethyl-3-methyl imidazole tetrafluoroborate ion liquid assisted La doped TiO2 Photocatalyst, La doping ratio 0.12-0.13%, ion liquid content 12-13 mL / mg.It is prepared using sol-gel method, by precisely controlling A, B liquid ratio and 595-605 DEG C, 1.8-2.2h calcination process, realize lattice defect controllable and crystal form stable.When applied, the mass ratio of catalyst and rhodamine B is 99-101:1, and rhodamine B in wastewater can be efficiently degraded under illumination for ≥80 min, with a degradation rate of ≥92%.The degradation rate is still ≥88% after being reused for 5 times.The catalyst has stable crystal form, high photocatalytic efficiency, environmental protection and economy, and is suitable for treating wastewater containing rhodamine B in multiple industries.

The invention relates to a preparation method and application of a low-temperature-resistant gel polymer electrolyte, and belongs to the technical field of polymer electrolytes. The technical problem to be solved by the invention is to provide the preparation method of the low-temperature-resistant gel polymer electrolyte suitable for the lithium metal battery. The method comprises the following steps: uniformly mixing an ether electrolyte, cross-linking agents such as potassium allyltrifluoroborate and pentaerythritol tetraacrylate, and fluoroethylene carbonate to obtain a precursor solution; uniformly mixing azodiisobutyronitrile with the precursor solution to obtain a reaction solution; and heating and reacting to obtain the low-temperature-resistant gel polymer electrolyte. By introducing the anion conductor, the freezing resistance of the electrolyte is remarkably improved, good low-temperature tolerance can be realized, and the low-temperature cycle performance is improved. The electrolyte has high conductivity, and overcomes the defect of low low-temperature ionic conductivity of the conventional polymer electrolyte; the lithium ion transference number is high, and the defect of low Li < + > transference number of the polymer electrolyte is effectively solved.

The application discloses a kind of nanometer composite ionic gel materials with impact resistance and a preparation method thereof, and belongs to the field of polymer composite materials.The application prepares a solvent by mixing and heating 5-methyl-2-isopropyl phenol and tetrabutylammonium tetrafluoroborate, then adds isobornyl acrylate, hexafluorobutyl acrylate, KH570 modified silicon dioxide nanoparticles, 2,6-diphenyl phenoxy ethyl acrylate, a photoinitiator and a crosslinking agent in the solvent, and the nanometer composite ionic gel material can be obtained after photopolymerization.The nanometer composite ionic gel material prepared by the application is soft and has low modulus in normal state, but when subjected to high-speed impact, rapid and efficient energy dissipation occurs inside, the modulus sharply rises, and the intelligent protection effect of "encountering rigidity to be rigid, encountering softness to be soft" can be realized.

The invention discloses halogenated hydrocarbon and a preparation method and application thereof, and belongs to the field of chemical synthesis technology and application, olefin containing R1 and R2 groups is used as a raw material, and the R1 group is-H; r2 group is one of-CON (CH3) 2,-CONHC2H5 and-CONC (CH3) 3, nitrobenzene tetrafluoroborate diazonium salt and halogen element sodium salt are added, and halogenated hydrocarbon is prepared in the presence of an organic solvent, visible light and a quantum dot catalyst; the halogenated hydrocarbon prepared by the method can be applied to synthesis of a natural product cinnamamide and an antibacterial agent, and has a relatively great industrial application prospect.

The application belongs to the technical field of organic synthesis, and particularly relates to a kind of beta-carbonyl dithiophosphoric acid ester compounds, preparation method and application. The application is prepared by using cheap and easily available styrene, P4S 10 And alcohol as raw material, tetrabutylammonium tetrafluoroborate ( n Bu4NBF4) as electrolyte, acetonitrile (CH3CN) as solvent, beta-carbonyl dithiophosphoric acid ester compound is prepared in room temperature and air atmosphere. Compared with the preparation method reported previously, the application has the advantages of green, environmental protection, safety, high efficiency and energy saving, the raw material is easy to obtain, and the operation is simple, and has potential industrial application prospect.

The invention relates to a method for synthesizing quinolinone compounds by catalyzing aromatic aldehyde and o-aminoacetophenone through L-proline in a green solvent. According to the method, the specific green solvent (any one of 1-hydroxyethyl-3-methylimidazolium tetrafluoroborate, 1-hydroxyethyl-3-methylimidazolium hexafluorophosphate or a deep eutectic solvent consisting of choline chloride and glycerol) is adopted, so that the yield of the quinolinone compound synthesized from aromatic aldehyde and o-aminoacetophenone under catalysis of L-proline can be remarkably improved; and by adopting other green solvents (such as [BMIM] BF4, [BMIM] PF6 and the like), the yield is obviously reduced. In addition, the method does not need to use an organic solvent, meets the standard of green chemistry, and is simple to operate, mild in reaction condition and short in consumed time.

The invention provides fluorescein and a purification and synthesis method thereof, and relates to the field of compound preparation. The method comprises the following steps: carrying out first mixing and first reaction on 4-(aminomethyl) benzoic acid, triethylamine, a first organic solvent and trifluoroacetate to obtain a first intermediate; performing second mixing on the first intermediate, a second organic solvent, triethylamine and 2-succinimido-1, 1, 3, 3-tetramethylurea tetrafluoroborate, and performing second reaction to obtain a second intermediate; and carrying out third mixing on the second intermediate, amino FAM, a third organic solvent and triethylamine, and carrying out third reaction to obtain fluorescein. The synthesis and purification method is efficient, and fluorescein can be rapidly obtained without column chromatography; chemical raw materials used in the synthesis method are simple and easy to obtain, the cost is low, reaction conditions are mild, amplified production is easy, the purification method is simple and convenient to operate, and the obtained intermediate is high in stability.

The invention provides a modified sulfide solid electrolyte and a preparation method of the modified sulfide solid electrolyte. The modified sulfide solid electrolyte comprises a sulfide solid electrolyte matrix and a hydrophobic protection layer formed on the surface of the sulfide solid electrolyte matrix, the hydrophobic protection layer comprises fluoroborate and a bipolar solvent, and the bipolar solvent has hydrophobic groups and hydrophilic groups. And the hydrophilic groups are chemically bonded with sulfur atoms on the surface of the sulfide solid electrolyte matrix. The air stability of the modified sulfide solid electrolyte is obviously improved.